Memory unit capable of detecting error in regenerated data from

Details Memory unit capable of detecting error in regenerated data from Memory unit capable of detecting error in regenerated data from

1989-02-15

1990-06-26

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

G11B 509

Patent

active

049376870

ABSTRACT:
A memory unit adapted for use with an electronic computer or the like. In the unit, a data-clock pulse train regenerated by a head is discriminated into a data pulse train and a clock pulse train by a discrimination circuit in accordance with a phase-variable gate signal outputted from a gate circuit, and any error in each of such discriminated pulse trains is detected by a regeneration error detection circuit. Meanwhile, when a discrimination phase margin of the gate signal outputted from the gate circuit has become narrower than a predetermined value, such state is detected by a phase margin detection circuit, so that any regeneration error in the data-clock pulse train can be detected with a high precision.

REFERENCES:
patent: 4141046 (1979-02-01), Brown
patent: 4191976 (1980-03-01), Braun
patent: 4417286 (1983-11-01), Anderson
patent: 4472818 (1984-09-01), Zapisek et al.
patent: 4580278 (1986-04-01), Yamamoto
patent: 4638472 (1987-01-01), Ogata et al.
patent: 4737866 (1989-04-01), Ebata
patent: 4811125 (1989-03-01), Sengoku

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